java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf -i ../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 03:17:00,358 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 03:17:00,361 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 03:17:00,379 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 03:17:00,379 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 03:17:00,380 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 03:17:00,381 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 03:17:00,383 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 03:17:00,385 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 03:17:00,386 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 03:17:00,387 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 03:17:00,387 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 03:17:00,388 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 03:17:00,390 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 03:17:00,391 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 03:17:00,393 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 03:17:00,399 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 03:17:00,402 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 03:17:00,403 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 03:17:00,404 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 03:17:00,407 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 03:17:00,418 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 03:17:00,419 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 03:17:00,420 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_mostprecise.epf [2018-01-21 03:17:00,434 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 03:17:00,434 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 03:17:00,435 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 03:17:00,437 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 03:17:00,437 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 03:17:00,437 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 03:17:00,438 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 03:17:00,438 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 03:17:00,438 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 03:17:00,439 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 03:17:00,439 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 03:17:00,439 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 03:17:00,439 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 03:17:00,440 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 03:17:00,440 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 03:17:00,441 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 03:17:00,441 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 03:17:00,441 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 03:17:00,441 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 03:17:00,441 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 03:17:00,442 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 03:17:00,442 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 03:17:00,442 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 03:17:00,442 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 03:17:00,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 03:17:00,443 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 03:17:00,443 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 03:17:00,443 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:17:00,443 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 03:17:00,443 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 03:17:00,444 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 03:17:00,444 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 03:17:00,445 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 03:17:00,446 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 03:17:00,446 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 03:17:00,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 03:17:00,446 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 03:17:00,447 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 03:17:00,447 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 03:17:00,448 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 03:17:00,500 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 03:17:00,512 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 03:17:00,515 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 03:17:00,516 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 03:17:00,517 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 03:17:00,517 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-memsafety/ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-21 03:17:00,701 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 03:17:00,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 03:17:00,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 03:17:00,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 03:17:00,712 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 03:17:00,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4aa56ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00, skipping insertion in model container [2018-01-21 03:17:00,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,735 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:17:00,754 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 03:17:00,876 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:17:00,898 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 03:17:00,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00 WrapperNode [2018-01-21 03:17:00,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 03:17:00,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 03:17:00,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 03:17:00,907 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 03:17:00,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... [2018-01-21 03:17:00,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 03:17:00,936 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 03:17:00,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 03:17:00,936 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 03:17:00,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 03:17:00,983 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 03:17:00,983 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 03:17:00,983 INFO L136 BoogieDeclarations]: Found implementation of procedure foo [2018-01-21 03:17:00,983 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure foo [2018-01-21 03:17:00,984 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 03:17:00,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 03:17:00,985 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 03:17:01,157 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 03:17:01,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:17:01 BoogieIcfgContainer [2018-01-21 03:17:01,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 03:17:01,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 03:17:01,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 03:17:01,162 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 03:17:01,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 03:17:00" (1/3) ... [2018-01-21 03:17:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75133056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:17:01, skipping insertion in model container [2018-01-21 03:17:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 03:17:00" (2/3) ... [2018-01-21 03:17:01,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75133056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 03:17:01, skipping insertion in model container [2018-01-21 03:17:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 03:17:01" (3/3) ... [2018-01-21 03:17:01,167 INFO L105 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_false-valid-deref-read.c [2018-01-21 03:17:01,176 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 03:17:01,184 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-01-21 03:17:01,234 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:17:01,234 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:17:01,234 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:17:01,235 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:17:01,235 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:17:01,235 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:17:01,235 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:17:01,235 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 03:17:01,236 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:17:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:17:01,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 03:17:01,264 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:01,265 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 03:17:01,266 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 03:17:01,271 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 03:17:01,274 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:01,328 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,329 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:01,329 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,329 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:17:01,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 03:17:01,388 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 03:17:01,394 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 03:17:01,400 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:17:01,401 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:17:01,401 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:17:01,401 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:17:01,401 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:17:01,401 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:17:01,402 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:17:01,402 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooErr0EnsuresViolation======== [2018-01-21 03:17:01,402 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:17:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:17:01,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 03:17:01,405 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:01,406 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:01,406 INFO L371 AbstractCegarLoop]: === Iteration 1 === [fooErr0EnsuresViolation]=== [2018-01-21 03:17:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 352444009, now seen corresponding path program 1 times [2018-01-21 03:17:01,406 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:01,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,407 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:01,407 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,407 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:01,434 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:01,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:01,487 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:17:01,487 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:17:01,487 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:17:01,489 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:17:01,501 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:17:01,501 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:17:01,504 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 03:17:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:01,540 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 03:17:01,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:17:01,543 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-01-21 03:17:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:01,553 INFO L225 Difference]: With dead ends: 72 [2018-01-21 03:17:01,553 INFO L226 Difference]: Without dead ends: 0 [2018-01-21 03:17:01,563 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:17:01,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-01-21 03:17:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-01-21 03:17:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-01-21 03:17:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-01-21 03:17:01,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-01-21 03:17:01,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:01,671 INFO L432 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-01-21 03:17:01,671 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:17:01,672 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-01-21 03:17:01,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-01-21 03:17:01,674 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 03:17:01,674 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 03:17:01,674 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 03:17:01,675 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 03:17:01,675 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 03:17:01,675 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 03:17:01,675 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 03:17:01,675 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 03:17:01,675 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 03:17:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2018-01-21 03:17:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-01-21 03:17:01,679 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:01,679 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:01,679 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1481761889, now seen corresponding path program 1 times [2018-01-21 03:17:01,679 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:01,680 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,681 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:01,681 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,681 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:01,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:01,701 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:17:01,701 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 03:17:01,701 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:17:01,701 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 03:17:01,702 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 03:17:01,702 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:17:01,702 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 2 states. [2018-01-21 03:17:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:01,707 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2018-01-21 03:17:01,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 03:17:01,707 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-01-21 03:17:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:01,709 INFO L225 Difference]: With dead ends: 72 [2018-01-21 03:17:01,709 INFO L226 Difference]: Without dead ends: 37 [2018-01-21 03:17:01,710 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 03:17:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-01-21 03:17:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-01-21 03:17:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 03:17:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 03:17:01,720 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 17 [2018-01-21 03:17:01,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:01,721 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 03:17:01,721 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 03:17:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 03:17:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 03:17:01,722 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:01,722 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:01,722 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:01,722 INFO L82 PathProgramCache]: Analyzing trace with hash 499012364, now seen corresponding path program 1 times [2018-01-21 03:17:01,722 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:01,723 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,723 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:01,723 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,723 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:01,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:01,788 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:17:01,788 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 03:17:01,789 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:17:01,790 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 03:17:01,791 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 03:17:01,791 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:17:01,792 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 3 states. [2018-01-21 03:17:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:01,872 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2018-01-21 03:17:01,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 03:17:01,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-01-21 03:17:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:01,877 INFO L225 Difference]: With dead ends: 66 [2018-01-21 03:17:01,877 INFO L226 Difference]: Without dead ends: 51 [2018-01-21 03:17:01,879 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 03:17:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-01-21 03:17:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-01-21 03:17:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-01-21 03:17:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-01-21 03:17:01,894 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 19 [2018-01-21 03:17:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:01,894 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-01-21 03:17:01,894 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 03:17:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-01-21 03:17:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-01-21 03:17:01,896 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:01,896 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:01,896 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1504830404, now seen corresponding path program 1 times [2018-01-21 03:17:01,896 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:01,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,898 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:01,898 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:01,898 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:01,918 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:02,176 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 03:17:02,176 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-01-21 03:17:02,176 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 03:17:02,177 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 03:17:02,177 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 03:17:02,177 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-01-21 03:17:02,178 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2018-01-21 03:17:02,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:02,366 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2018-01-21 03:17:02,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:17:02,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2018-01-21 03:17:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:02,367 INFO L225 Difference]: With dead ends: 90 [2018-01-21 03:17:02,367 INFO L226 Difference]: Without dead ends: 59 [2018-01-21 03:17:02,368 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:17:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-01-21 03:17:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2018-01-21 03:17:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-01-21 03:17:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2018-01-21 03:17:02,374 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 31 [2018-01-21 03:17:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:02,374 INFO L432 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2018-01-21 03:17:02,374 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 03:17:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2018-01-21 03:17:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-01-21 03:17:02,376 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:02,377 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:02,377 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -151955344, now seen corresponding path program 1 times [2018-01-21 03:17:02,377 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:02,378 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:02,378 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:02,378 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:02,378 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:02,394 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:02,512 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:02,512 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:02,513 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-01-21 03:17:02,515 INFO L201 CegarAbsIntRunner]: [0], [1], [3], [7], [10], [12], [13], [14], [16], [20], [21], [26], [27], [28], [29], [33], [36], [38], [40], [42], [46], [50], [55], [58], [60], [61], [62], [72], [74], [75], [76], [77], [78], [79] [2018-01-21 03:17:02,578 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 03:17:02,578 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 03:17:05,905 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 03:17:05,907 INFO L268 AbstractInterpreter]: Visited 34 different actions 115 times. Merged at 22 different actions 56 times. Never widened. Found 9 fixpoints after 4 different actions. Largest state had 21 variables. [2018-01-21 03:17:05,926 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 03:17:05,927 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:05,927 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:05,940 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:05,940 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:17:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:05,974 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:06,075 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 03:17:06,317 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:06,317 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:06,327 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:06,327 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:17:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:06,363 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:17:06,398 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 03:17:06,508 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:06,508 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 4, 4] total 16 [2018-01-21 03:17:06,508 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:06,509 INFO L409 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-01-21 03:17:06,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-01-21 03:17:06,510 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2018-01-21 03:17:06,510 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 10 states. [2018-01-21 03:17:06,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:06,836 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2018-01-21 03:17:06,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 03:17:06,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2018-01-21 03:17:06,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:06,838 INFO L225 Difference]: With dead ends: 103 [2018-01-21 03:17:06,838 INFO L226 Difference]: Without dead ends: 61 [2018-01-21 03:17:06,839 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2018-01-21 03:17:06,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-01-21 03:17:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48. [2018-01-21 03:17:06,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-01-21 03:17:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-01-21 03:17:06,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 36 [2018-01-21 03:17:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:06,846 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-01-21 03:17:06,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-01-21 03:17:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-01-21 03:17:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 03:17:06,847 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:06,847 INFO L322 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:06,847 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:06,847 INFO L82 PathProgramCache]: Analyzing trace with hash -524554428, now seen corresponding path program 2 times [2018-01-21 03:17:06,847 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:06,848 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:06,848 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:06,849 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:06,849 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:06,864 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 03:17:06,905 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:06,905 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:06,905 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:06,905 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:06,905 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:06,905 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:06,910 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:17:06,910 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:06,921 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:06,933 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:06,936 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:06,939 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 03:17:06,952 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 03:17:06,995 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:06,995 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:06,998 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:17:06,998 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:07,008 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:07,019 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:07,027 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:07,030 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 03:17:07,036 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-01-21 03:17:07,064 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:07,064 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 7 [2018-01-21 03:17:07,064 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:07,065 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 03:17:07,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 03:17:07,065 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:17:07,065 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 5 states. [2018-01-21 03:17:07,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:07,120 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2018-01-21 03:17:07,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 03:17:07,120 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2018-01-21 03:17:07,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:07,121 INFO L225 Difference]: With dead ends: 89 [2018-01-21 03:17:07,122 INFO L226 Difference]: Without dead ends: 72 [2018-01-21 03:17:07,122 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-01-21 03:17:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-01-21 03:17:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2018-01-21 03:17:07,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-01-21 03:17:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-01-21 03:17:07,131 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 41 [2018-01-21 03:17:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:07,131 INFO L432 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2018-01-21 03:17:07,132 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 03:17:07,132 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2018-01-21 03:17:07,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-01-21 03:17:07,134 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:07,134 INFO L322 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:07,134 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:07,134 INFO L82 PathProgramCache]: Analyzing trace with hash 936865683, now seen corresponding path program 3 times [2018-01-21 03:17:07,134 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:07,135 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:07,135 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:07,136 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:07,136 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:07,159 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 03:17:07,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,216 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:07,216 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:07,217 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:07,217 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,217 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:07,223 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:17:07,223 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:17:07,237 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,241 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,245 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,246 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:07,249 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 03:17:07,259 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 03:17:07,355 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,355 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:07,361 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:17:07,361 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:17:07,377 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,391 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,409 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:07,418 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:07,422 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 03:17:07,430 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-01-21 03:17:07,483 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:07,483 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-01-21 03:17:07,483 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:07,483 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 03:17:07,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 03:17:07,484 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 03:17:07,484 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 6 states. [2018-01-21 03:17:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:07,535 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2018-01-21 03:17:07,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 03:17:07,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2018-01-21 03:17:07,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:07,537 INFO L225 Difference]: With dead ends: 107 [2018-01-21 03:17:07,537 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 03:17:07,537 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-01-21 03:17:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 03:17:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2018-01-21 03:17:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-01-21 03:17:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2018-01-21 03:17:07,547 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 62 [2018-01-21 03:17:07,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:07,548 INFO L432 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2018-01-21 03:17:07,548 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 03:17:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2018-01-21 03:17:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-01-21 03:17:07,550 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:07,551 INFO L322 BasicCegarLoop]: trace histogram [9, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:07,551 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1345357476, now seen corresponding path program 4 times [2018-01-21 03:17:07,551 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:07,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:07,552 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:07,552 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:07,553 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:07,577 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-01-21 03:17:07,698 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,698 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:07,698 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:07,698 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:07,699 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,699 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:07,707 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:17:07,708 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:17:07,730 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:07,734 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-21 03:17:07,827 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-21 03:17:07,966 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:07,966 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:07,969 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:17:07,969 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:17:08,003 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:08,008 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 118 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-01-21 03:17:08,027 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 50 proven. 42 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-01-21 03:17:08,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:08,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8, 8, 8] total 15 [2018-01-21 03:17:08,159 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:08,160 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-01-21 03:17:08,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-01-21 03:17:08,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-01-21 03:17:08,160 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 12 states. [2018-01-21 03:17:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:08,399 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2018-01-21 03:17:08,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 03:17:08,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2018-01-21 03:17:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:08,400 INFO L225 Difference]: With dead ends: 185 [2018-01-21 03:17:08,401 INFO L226 Difference]: Without dead ends: 135 [2018-01-21 03:17:08,401 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2018-01-21 03:17:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-01-21 03:17:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2018-01-21 03:17:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-01-21 03:17:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2018-01-21 03:17:08,413 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 83 [2018-01-21 03:17:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:08,413 INFO L432 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2018-01-21 03:17:08,413 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-01-21 03:17:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2018-01-21 03:17:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-01-21 03:17:08,415 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:08,415 INFO L322 BasicCegarLoop]: trace histogram [15, 11, 11, 11, 11, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:08,415 INFO L371 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:08,415 INFO L82 PathProgramCache]: Analyzing trace with hash -389182277, now seen corresponding path program 5 times [2018-01-21 03:17:08,415 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:08,416 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:08,416 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:08,416 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:08,416 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:08,443 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2018-01-21 03:17:08,564 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:08,564 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:08,564 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:08,564 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:08,564 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:08,564 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:08,572 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:17:08,572 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:08,589 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:08,592 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:08,599 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:08,616 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:08,635 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:08,648 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:08,653 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 270 proven. 118 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-01-21 03:17:08,790 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 218 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-01-21 03:17:09,151 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:09,151 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:09,155 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:17:09,155 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:09,170 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:09,175 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:09,189 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:09,209 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:09,233 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:09,246 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:09,252 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 302 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-01-21 03:17:09,346 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 142 proven. 207 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2018-01-21 03:17:09,749 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:09,749 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13, 13, 13, 13] total 29 [2018-01-21 03:17:09,749 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:09,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-01-21 03:17:09,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-01-21 03:17:09,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2018-01-21 03:17:09,750 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand 18 states. [2018-01-21 03:17:10,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:10,739 INFO L93 Difference]: Finished difference Result 234 states and 263 transitions. [2018-01-21 03:17:10,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-01-21 03:17:10,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 119 [2018-01-21 03:17:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:10,742 INFO L225 Difference]: With dead ends: 234 [2018-01-21 03:17:10,742 INFO L226 Difference]: Without dead ends: 172 [2018-01-21 03:17:10,743 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 445 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1490, Unknown=0, NotChecked=0, Total=1806 [2018-01-21 03:17:10,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-01-21 03:17:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 131. [2018-01-21 03:17:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-01-21 03:17:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2018-01-21 03:17:10,759 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 119 [2018-01-21 03:17:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:10,760 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2018-01-21 03:17:10,760 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-01-21 03:17:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2018-01-21 03:17:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-01-21 03:17:10,763 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:10,764 INFO L322 BasicCegarLoop]: trace histogram [22, 17, 17, 17, 17, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:10,764 INFO L371 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash 349526166, now seen corresponding path program 6 times [2018-01-21 03:17:10,764 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:10,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:10,765 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:10,765 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:10,765 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:10,799 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 03:17:10,927 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:10,927 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:10,927 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:10,927 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:10,927 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:10,928 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:10,935 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:17:10,936 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:17:10,952 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:10,962 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:10,977 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:10,988 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:10,992 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:10,995 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,000 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,004 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,013 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:11,017 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 03:17:11,097 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 03:17:11,295 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:11,296 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:11,299 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:17:11,299 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:17:11,317 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,329 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,354 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,375 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,407 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,440 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,479 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,579 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,766 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:11,788 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:11,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 03:17:11,809 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 910 trivial. 0 not checked. [2018-01-21 03:17:11,857 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:11,858 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 15 [2018-01-21 03:17:11,858 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:11,858 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-01-21 03:17:11,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-01-21 03:17:11,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 03:17:11,858 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand 9 states. [2018-01-21 03:17:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:11,954 INFO L93 Difference]: Finished difference Result 208 states and 233 transitions. [2018-01-21 03:17:11,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 03:17:11,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 160 [2018-01-21 03:17:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:11,956 INFO L225 Difference]: With dead ends: 208 [2018-01-21 03:17:11,956 INFO L226 Difference]: Without dead ends: 175 [2018-01-21 03:17:11,957 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-01-21 03:17:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-01-21 03:17:11,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2018-01-21 03:17:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-01-21 03:17:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2018-01-21 03:17:11,967 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 160 [2018-01-21 03:17:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:11,968 INFO L432 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2018-01-21 03:17:11,968 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-01-21 03:17:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2018-01-21 03:17:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-01-21 03:17:11,970 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:11,970 INFO L322 BasicCegarLoop]: trace histogram [27, 21, 21, 21, 21, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:11,970 INFO L371 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1727385407, now seen corresponding path program 7 times [2018-01-21 03:17:11,970 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:11,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:11,971 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:11,971 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:11,972 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:12,003 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 1392 trivial. 0 not checked. [2018-01-21 03:17:12,140 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:12,140 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:12,140 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:12,140 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:12,141 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:12,141 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:12,145 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:12,146 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:17:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:12,189 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-21 03:17:12,292 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-21 03:17:12,492 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:12,493 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:12,496 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:12,496 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 03:17:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:12,582 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 995 proven. 38 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2018-01-21 03:17:12,607 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1479 backedges. 311 proven. 240 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2018-01-21 03:17:12,795 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:12,795 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12, 12, 12] total 24 [2018-01-21 03:17:12,795 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:12,796 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-21 03:17:12,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-21 03:17:12,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2018-01-21 03:17:12,797 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand 19 states. [2018-01-21 03:17:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:13,116 INFO L93 Difference]: Finished difference Result 363 states and 408 transitions. [2018-01-21 03:17:13,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-01-21 03:17:13,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 191 [2018-01-21 03:17:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:13,119 INFO L225 Difference]: With dead ends: 363 [2018-01-21 03:17:13,119 INFO L226 Difference]: Without dead ends: 280 [2018-01-21 03:17:13,120 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 782 GetRequests, 737 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=952, Unknown=0, NotChecked=0, Total=1190 [2018-01-21 03:17:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-01-21 03:17:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 180. [2018-01-21 03:17:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-01-21 03:17:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 201 transitions. [2018-01-21 03:17:13,136 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 201 transitions. Word has length 191 [2018-01-21 03:17:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:13,137 INFO L432 AbstractCegarLoop]: Abstraction has 180 states and 201 transitions. [2018-01-21 03:17:13,137 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-21 03:17:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 201 transitions. [2018-01-21 03:17:13,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-01-21 03:17:13,139 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:13,139 INFO L322 BasicCegarLoop]: trace histogram [36, 29, 29, 29, 29, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:13,139 INFO L371 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash 927615722, now seen corresponding path program 8 times [2018-01-21 03:17:13,140 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:13,140 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:13,140 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 03:17:13,140 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:13,140 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:13,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:13,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2562 trivial. 0 not checked. [2018-01-21 03:17:13,374 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:13,375 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:13,375 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:13,375 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:13,375 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:13,375 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:13,380 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:17:13,380 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:13,400 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:13,426 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:13,430 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:13,435 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-21 03:17:13,560 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-21 03:17:13,887 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:13,887 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:13,890 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-01-21 03:17:13,890 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:13,909 INFO L201 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:13,953 INFO L214 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:13,990 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:14,000 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 1730 proven. 60 refuted. 0 times theorem prover too weak. 891 trivial. 0 not checked. [2018-01-21 03:17:14,049 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 544 proven. 360 refuted. 0 times theorem prover too weak. 1777 trivial. 0 not checked. [2018-01-21 03:17:14,311 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:14,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14, 14, 14] total 28 [2018-01-21 03:17:14,311 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:14,312 INFO L409 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-01-21 03:17:14,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-01-21 03:17:14,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2018-01-21 03:17:14,312 INFO L87 Difference]: Start difference. First operand 180 states and 201 transitions. Second operand 22 states. [2018-01-21 03:17:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:14,686 INFO L93 Difference]: Finished difference Result 460 states and 516 transitions. [2018-01-21 03:17:14,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-01-21 03:17:14,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 242 [2018-01-21 03:17:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:14,688 INFO L225 Difference]: With dead ends: 460 [2018-01-21 03:17:14,688 INFO L226 Difference]: Without dead ends: 365 [2018-01-21 03:17:14,690 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 989 GetRequests, 936 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2018-01-21 03:17:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2018-01-21 03:17:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 225. [2018-01-21 03:17:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-01-21 03:17:14,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 252 transitions. [2018-01-21 03:17:14,704 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 252 transitions. Word has length 242 [2018-01-21 03:17:14,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:14,704 INFO L432 AbstractCegarLoop]: Abstraction has 225 states and 252 transitions. [2018-01-21 03:17:14,704 INFO L433 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-01-21 03:17:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 252 transitions. [2018-01-21 03:17:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-01-21 03:17:14,705 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:14,706 INFO L322 BasicCegarLoop]: trace histogram [46, 38, 38, 38, 38, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:14,706 INFO L371 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:14,706 INFO L82 PathProgramCache]: Analyzing trace with hash -965692109, now seen corresponding path program 9 times [2018-01-21 03:17:14,706 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:14,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:14,707 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:14,707 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:14,707 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:14,746 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 4291 trivial. 0 not checked. [2018-01-21 03:17:15,013 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:15,013 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:15,013 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:15,013 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:15,014 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:15,014 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:15,021 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:17:15,021 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:17:15,044 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,048 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,052 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,057 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,063 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,070 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,077 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,084 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,086 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:15,091 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 03:17:15,336 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 03:17:15,693 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:15,693 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:15,697 INFO L101 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-01-21 03:17:15,697 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-01-21 03:17:15,724 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,733 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,780 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,801 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,837 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:15,908 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:16,043 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:16,293 INFO L254 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued a check-sat command [2018-01-21 03:17:16,317 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:16,326 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 03:17:16,377 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4447 backedges. 1173 proven. 87 refuted. 0 times theorem prover too weak. 3187 trivial. 0 not checked. [2018-01-21 03:17:16,596 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:16,596 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12, 12, 12] total 29 [2018-01-21 03:17:16,596 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:16,597 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-01-21 03:17:16,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-01-21 03:17:16,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2018-01-21 03:17:16,597 INFO L87 Difference]: Start difference. First operand 225 states and 252 transitions. Second operand 19 states. [2018-01-21 03:17:16,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:16,912 INFO L93 Difference]: Finished difference Result 535 states and 610 transitions. [2018-01-21 03:17:16,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-01-21 03:17:16,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 298 [2018-01-21 03:17:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:16,917 INFO L225 Difference]: With dead ends: 535 [2018-01-21 03:17:16,917 INFO L226 Difference]: Without dead ends: 490 [2018-01-21 03:17:16,918 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1172 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2018-01-21 03:17:16,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2018-01-21 03:17:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 283. [2018-01-21 03:17:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-01-21 03:17:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 322 transitions. [2018-01-21 03:17:16,936 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 322 transitions. Word has length 298 [2018-01-21 03:17:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:16,937 INFO L432 AbstractCegarLoop]: Abstraction has 283 states and 322 transitions. [2018-01-21 03:17:16,937 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-01-21 03:17:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 322 transitions. [2018-01-21 03:17:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-01-21 03:17:16,939 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:16,939 INFO L322 BasicCegarLoop]: trace histogram [57, 48, 48, 48, 48, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:16,939 INFO L371 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1850454344, now seen corresponding path program 10 times [2018-01-21 03:17:16,940 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:16,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:16,940 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:16,940 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:16,941 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:16,969 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 6720 trivial. 0 not checked. [2018-01-21 03:17:17,247 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:17,247 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:17,247 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:17,247 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:17,247 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:17,247 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:17,255 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:17:17,255 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:17:17,322 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:17,327 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-21 03:17:17,670 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-21 03:17:18,140 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:18,140 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 21 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:18,143 INFO L101 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-01-21 03:17:18,143 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-01-21 03:17:18,265 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:18,276 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 4094 proven. 119 refuted. 0 times theorem prover too weak. 2705 trivial. 0 not checked. [2018-01-21 03:17:18,337 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6918 backedges. 1298 proven. 675 refuted. 0 times theorem prover too weak. 4945 trivial. 0 not checked. [2018-01-21 03:17:18,588 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:18,588 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18, 18, 18] total 36 [2018-01-21 03:17:18,589 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:18,589 INFO L409 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-01-21 03:17:18,589 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-01-21 03:17:18,590 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2018-01-21 03:17:18,590 INFO L87 Difference]: Start difference. First operand 283 states and 322 transitions. Second operand 28 states. [2018-01-21 03:17:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:19,335 INFO L93 Difference]: Finished difference Result 722 states and 827 transitions. [2018-01-21 03:17:19,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-01-21 03:17:19,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 359 [2018-01-21 03:17:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:19,339 INFO L225 Difference]: With dead ends: 722 [2018-01-21 03:17:19,340 INFO L226 Difference]: Without dead ends: 593 [2018-01-21 03:17:19,341 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1463 GetRequests, 1394 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2018-01-21 03:17:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-01-21 03:17:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 338. [2018-01-21 03:17:19,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-01-21 03:17:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 382 transitions. [2018-01-21 03:17:19,363 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 382 transitions. Word has length 359 [2018-01-21 03:17:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:19,363 INFO L432 AbstractCegarLoop]: Abstraction has 338 states and 382 transitions. [2018-01-21 03:17:19,363 INFO L433 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-01-21 03:17:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 382 transitions. [2018-01-21 03:17:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2018-01-21 03:17:19,365 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:19,365 INFO L322 BasicCegarLoop]: trace histogram [68, 58, 58, 58, 58, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:19,366 INFO L371 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1447339731, now seen corresponding path program 11 times [2018-01-21 03:17:19,366 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:19,366 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:19,367 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:19,367 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:19,367 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:19,402 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:19,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 9695 trivial. 0 not checked. [2018-01-21 03:17:19,804 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:19,805 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:19,805 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:19,805 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:19,805 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:19,805 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:19,810 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:17:19,811 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:19,838 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,842 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,847 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,859 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,865 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,872 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,878 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,884 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,890 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:19,892 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:19,899 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-21 03:17:20,187 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-21 03:17:20,772 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:20,878 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:20,881 INFO L101 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-01-21 03:17:20,881 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-01-21 03:17:20,919 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:20,934 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:20,962 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:20,994 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,060 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,132 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,211 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,309 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,393 INFO L278 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued a check-sat command [2018-01-21 03:17:21,438 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:21,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5758 proven. 500 refuted. 0 times theorem prover too weak. 3682 trivial. 0 not checked. [2018-01-21 03:17:21,550 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 874 proven. 2168 refuted. 0 times theorem prover too weak. 6898 trivial. 0 not checked. [2018-01-21 03:17:21,901 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-01-21 03:17:21,901 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19, 19, 19] total 40 [2018-01-21 03:17:21,901 INFO L247 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-01-21 03:17:21,902 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-01-21 03:17:21,902 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-01-21 03:17:21,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2018-01-21 03:17:21,903 INFO L87 Difference]: Start difference. First operand 338 states and 382 transitions. Second operand 30 states. [2018-01-21 03:17:24,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 03:17:24,810 INFO L93 Difference]: Finished difference Result 804 states and 906 transitions. [2018-01-21 03:17:24,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-01-21 03:17:24,811 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 420 [2018-01-21 03:17:24,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 03:17:24,814 INFO L225 Difference]: With dead ends: 804 [2018-01-21 03:17:24,814 INFO L226 Difference]: Without dead ends: 458 [2018-01-21 03:17:24,817 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 1730 GetRequests, 1645 SyntacticMatches, 18 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2018-01-21 03:17:24,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-01-21 03:17:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 339. [2018-01-21 03:17:24,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-01-21 03:17:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 376 transitions. [2018-01-21 03:17:24,846 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 376 transitions. Word has length 420 [2018-01-21 03:17:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 03:17:24,847 INFO L432 AbstractCegarLoop]: Abstraction has 339 states and 376 transitions. [2018-01-21 03:17:24,847 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-01-21 03:17:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 376 transitions. [2018-01-21 03:17:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2018-01-21 03:17:24,851 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 03:17:24,852 INFO L322 BasicCegarLoop]: trace histogram [78, 67, 67, 67, 67, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 03:17:24,852 INFO L371 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 03:17:24,852 INFO L82 PathProgramCache]: Analyzing trace with hash 593814198, now seen corresponding path program 12 times [2018-01-21 03:17:24,852 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 03:17:24,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:24,853 INFO L99 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-01-21 03:17:24,853 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 03:17:24,854 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 03:17:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 03:17:24,905 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 03:17:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 12859 trivial. 0 not checked. [2018-01-21 03:17:25,939 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:25,939 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 03:17:25,939 INFO L183 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-01-21 03:17:25,940 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 03:17:25,940 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:25,940 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-21 03:17:25,955 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:17:25,956 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 03:17:25,994 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,010 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,026 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,039 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,044 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,050 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,064 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,073 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,084 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,093 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,102 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,112 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,123 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,135 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,145 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,155 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,169 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,181 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,194 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:26,197 INFO L239 tOrderPrioritization]: Conjunction of SSA is unsat [2018-01-21 03:17:26,206 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 03:17:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-21 03:17:26,520 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 03:17:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13156 backedges. 2730 proven. 156 refuted. 0 times theorem prover too weak. 10270 trivial. 0 not checked. [2018-01-21 03:17:27,070 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 03:17:27,071 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 25 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-01-21 03:17:27,075 INFO L101 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-01-21 03:17:27,075 INFO L280 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-01-21 03:17:27,122 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:27,133 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:27,157 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:27,186 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:27,247 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:27,349 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:28,013 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:34,758 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command [2018-01-21 03:17:46,806 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Received shutdown request... [2018-01-21 03:17:58,886 INFO L310 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued a check-sat command Cannot interrupt operation gracefully because timeout expired. Forcing shutdown